/usr/share/dialign-tx/seqt is in dialign-tx-data 1.0.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6
> seq1 WWWWWWPPPPPPP >seq2 WWWWWWPPPPPPP >seq3 WWWPPPPPPPP